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Information System Analysis Lab 6

Information System Analysis Lab 6. In this lab we will learn : Discuss level 0 diagram for Easy Travel Agency specifications. Example 2 : Easy Travel Agency specifications.

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Information System Analysis Lab 6

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  1. Information System Analysis Lab 6

  2. In this lab we will learn : • Discuss level 0 diagram for Easy Travel Agency specifications.

  3. Example 2: Easy Travel Agency specifications EasyTravel is a travel agency specializing in family holidays. It holds lists of hotels and charter flights and creates organized holidays for clients. Currently the company uses a paper based system. The company its tasks by the following text: • Bookings are made either through a list of agents, or by direct approach from clients. • When a client/agent makes an approach, the Reservations Clerk selects appropriate flight and hotel details for the customer and makes a provisional booking. The details are entered onto a provisional booking file.

  4. Easy Travel Agency specifications • The customer must confirm this booking within three days, by sending a deposit of 10% of costs. On receipt of this deposit, Reservations close the provisional booking and add the details to their full booking file. • Four weeks before the flight is due, Accounts send an invoice to the clients for the balance. Accounts notify Customer Services when the balance is received and Customer Services then send tickets and joining instructions. • Reminders are sent to customers three weeks and one week before departure. Although the company insists that payment is made at least one week before departure, it has been known that payment has been made and tickets received on the morning of the flight. • At the end of each month, commission of 15% is paid to any agents responsible for holidays commencing during that month.

  5. Context Diagram 0 Agency Booking system Provisional booking Client details Invoice Client/Agent Pay 10% Client/Agent Ticket instruction Reminders Pay balance 15% commissions Agent

  6. Creating DFD 2-Draw level 0 diagram

  7. Booking Client details D1:provisional booking file 1.0 Reservation Close Client/agent Pay 10% Booking D. Client/agent Provisional Booking Full Booking D2:full booking file Booking details 2.0 Account Pay balance Invoice 15%commission agent Balance received Ticket instruction 3.0 Customer serves Client/agent reminders

  8. Creating DFD 2-Draw level 1 diagram for process 1

  9. level 0 diagram -Process 1 Booking Client details D1:provisional booking file 1.0 Reservation Close Client/agent Booking detail Client/agent Provisional Booking Full Booking D2:full booking file

  10. Draw level 1 diagram for process 1 Client details 1.1 Select flight and hotel Client/agent Flight and hotel info Client/agent Provisional Booking 1.2 Provisional booking Booking D1:provisional booking file closing 1.3 Confirm booking Pay 10% Booking detail D2:full booking file Full booking

  11. Level 1 DFD Diagram • Generally, level 1 diagram is created for every major process on the level 0 diagram • Shows all the internal processes that are inside a single process on the level 0 diagram • Shows how information moves between these processes • If a parent process is decomposed into, for example, three child processes, these three child processes wholly and completely make up the parent process

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